Technical FAQs

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  FAQ: Is there different firmware for the through-hole Omega2 and surface mount Omega2S models?
  firmware faq omega2s o2 vs o2p o2 vs o2s • • Lazar Demin  

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  FAQ: The Onion store is sold out of the Omega2 or Omega2+. Does that mean you’ve stopped producing it?
  faq store out of stock • • Lazar Demin  

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  @SAnzor The Omega2 Dash will remain in production as long as there is demand for it and the Omega2S+ is available (latest guarantee is 2028)
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  FAQ: How do I install a MySQL Server on the Omega?
  faq mysql mysql-server • • Lazar Demin  

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  @akhileshthorat Is it possible to change the location of the buffer file? If so, put it in /tmp - this partition is actually run on (half of) the Omega's RAM, so it will be very fast to access and will have quite a bit of space, 64MB on the Omega2+/2S+
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  Script to deploy firmware to device using ethernet ipv6
  omega 2+ firmware update • • crispyoz  

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  @luz very interesting. Thank you for the contribution. I did the same thing. But with a different logic. Run the "master" board every minute she try, by wifi, to connect to an omega-... connect on ssh (with key accept by default yes) without sshpass. After a successful connection ssh she inject a script that downloads the .bin from a repository on the LAN and starts the sysupgrade. (by wifi) I tested it with 100pz in 2 houres, all automatic. I can create many masters... and do everything faster. But my version is sh + python script Onion Omega2+ is the best! €€€
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  FAQ: How do I detect if the hardware is an Omega2 or Omega2+ from Linux?
  faq hardware storage ram o2 vs o2p • • Lazar Demin  

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  FAQ: I heard there is some issue with hardware SPI? And full-duplex SPI?
  spi faq • • Lazar Demin  

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  Half Duplex SPI Transactions If you're looking to do a half-duplex SPI transaction (where Chip-Select is held active between blocks), check out the xfer3 function in the python-spidev module. Details: In the python-spidev module readme An example of usage in a community thread If you absolutely need full-duplex SPI The Omega2 family does not support full-duplex transactions on the hardware SPI bus, but you can make a software (bit-bang) instance of an SPI bus that will support full-duplex. More info on software-based SPI buses in this FAQ post.
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  FAQ: How can I control the GPIOs from Python/Is there an onionGpio module for Python3?
  python gpio faq python3 • • Lazar Demin  

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  Ubuntu 22 SSH Error
  ssh ubuntu • • crispyoz  

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  Config file entry should be:
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  FAQ: Is the original Omega from 2015 still getting software updates?
  faq original omega • • Lazar Demin  

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  @Duan-Gauche http://repo.onion.io/omega/images
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  FAQ: Is it possible to "clone" the firmware running on an Omega2 device and copy it to other Omega2 units?
  firmware openwrt faq clone • • Lazar Demin  

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  Hi Lazar, After having the auto-provisioning up and running I still have a small imperfection in play. Whenever mtd -r write <IMAGE-NAME>.bin firmware finishes it does not do the -r because it complains about not being able to [e]rase a block. ...it exits with 1 Writing from 20211027-pan35-blusser-9-5.bin to firmware ... [e]Failed to erase block mtd verify doesn't end well either. After a reboot the omega seems to be running my custom firmware happily, so I dont worry too much yet, but it keeps nagging I have followed the instructions closely, also tried a couple of times more to make a new .bin file using the dd method. This is how that runs: root@Pandora3-74F3:/mnt/mmcblk0# dd if=/dev/mtd3 of=20211108-pan35-blusser-9-5.bin 64896+0 records in 64896+0 records out Any idea where i should look? Thanks, Tony
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  FAQ: How can I make a software-based (bit-bang) SPI bus/I need 2 SPI devices/Can I use any 4 GPIOs as an SPI bus?
  spi faq spidev bitbang software spi • • Lazar Demin  

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  FAQ: My Omega2/2+/2S/2S+ won't boot! The serial console shows a logo and says there's 64 kB of DRAM
  faq hardware boot failure ram • • Lazar Demin  

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  FAQ: Any tips for designing custom hardware that uses the Omega2S? How can I get started?
  faq hardware omega2s custom hardware hardware design • • Lazar Demin  

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  @jossvall The UART TXD0 and TXD1 pins fall into the "must be floating or pulled down at boot time" category. That should be satisfied by most UART devices. Excerpt from the Omega2S Datasheet:
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  Using WireShark to listen to your Omega2 network activity
  ssh wireshark • • crispyoz  

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  FAQ: How come the Omega2+ won't reboot after I toggle the RST pin?
  faq reset solution omega2+ reset • • Lazar Demin  

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  FAQ: How can I make a software-based (bit-bang) I2C bus/Can I use any 2 GPIOs as an I2C bus?
  i2c faq i2c bus bitbang software i2c • • Lazar Demin  

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  FAQ: What is the default I2C bus clock speed? Can I change it to 400kHz?
  i2c faq i2c bus i2c clock i2c scl • • Lazar Demin  

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  FAQ: How do I check if I'm successfully connected to a WiFi network?
  wifi faq debug troubleshooting wifi debug • • Lazar Demin  

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  @Nagarjuna-Reddy @William-Scott @crispyoz @victoriano Added a new FAQ post: https://community.onion.io/topic/4291/faq-how-to-check-the-clients-connected-to-the-omega-s-wifi-ap
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  FAQ: How to check the clients connected to the Omega's WiFi AP?
  wifi faq networking wifi ap wifi clients • • Lazar Demin  

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  FAQ: How can I control which network interface is used for network traffic? Like use WiFi in some cases but ethernet in others
  faq internet config firewall • • Lazar Demin  

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